ML13316B320
| ML13316B320 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 04/14/1989 |
| From: | Knighton G Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML13316B317 | List: |
| References | |
| DPR-13-A-123 NUDOCS 8904280279 | |
| Download: ML13316B320 (8) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 SOUTHERN CALIFORNIA EDISON COMPANY SAN DIEGO GAS AND ELECTRIC COMPANY DOCKET NO. 50-206 SAN ONOFRE NUCLEAR GENERATING STATION, UNIT NO. 1 AMENDMENT TO PROVISIONAL OPERATING LICENSE Amendment No. 123 License No. DPR-13
- 1. The Nuclear Regulatory Commission (the Commission) has found that:
A. The application for amendment by Southern California Edison Company and San Diego Gas and Electric Company (the licensee) dated November 11, 1988, as supplemented February 14 and 22, and March 11 and 14, 1989, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act), and the Cohmmission's regulations set forth in 10 CFR Chapter I; B. The facility will operate in conformity with the application, the provisions of the Act, and the regulations of the Commission; C. There is reasonable assurance (i) that the activities authorized by this ameidment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Commission's regulations; D. The issuance of this amendment will riot be inimical to the common defense and security or to the health and safety of the public; and E. The issuance of this amendment is in accordance with 10 CFR Part 51 of the Commission's regulations and all applicable requirements hove been satisfied.
PDR ICJK C COt O
A
-2
- 2.
Accordingly, the license is amended by changes to the Technical Speci fications as indicated in the attachment to this license amendment, and pardgraphs 3.B. and 3.L of Provisional Operating License No. DPR-13 are hereby amended to read as follows:
B.
Technical Specifications The Technical Specifications contained in Appendix A, as revised through Amendment No.
123, are hereby incorporated in the license. Southern California Edison Company shall operate the facility in accordance with the Technical Specifications, except where otherwise stated in specific license conditions.
L. Diesel Generators The following requirements shall apply to the standby diesel generators:
(1) Approval to increase total connected loads on each diesel engine to 6000 kW or less is granted pending completion of NRC review of the crankshaft crack propagation analysis prepared by Failure Analysis Associates. This approval will remain in effect for up to 50 start-stops on each engine since the last inspection or until the end of Cycle 10, whichever comes first.
(2) A diesel engine maintenance and surveillance program as described in the Safety Evaluation related to Amendment No.123to Provisional Operating License No. DPR-13 is to be implemented. Changes to this program will be subject to the provisions of 10 CFR 50.59.
(3)
The frequency of the major diesel engine overhauls shall be consistent with Section IV.1, "Overhaul Frequency," in Revision 2 of Appendix II of the Design Review/Quality Revalidation Report that was transmitted by letter dated June 20, 1986, from M. 0. Medford, (SCE) to G. E. Lear, (NRC).
(4)
Oil hole locations in the five most heavily loaded main journals, i.e., journals 8 through 12 on each crankshaft shall be inspected at each refueling outage with liquid penetrant.
Indications found shall be evaluated with eddy current testing as appropriate.
During each major engine overhaul, the fillets of the most highly loaded main journals (Nos. 4 through 12) should be inspected together with the oil holes, using liquid penetrant.
Indications found shall be evaluated with eddy current testing as appropriate. In addition, these inspections should be
-3 performed for the oil holes and fillets in at least three of the crankpin journals at each major engine overhaul.
If during the refueling outage inspections or the major engine overhaul inspections referred to above, cracks are found in the oil holes or in other crankshaft surfaces, these findings are to be reported to the NRC within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The affected engine is to be considered inoperable and is not to be restored to operable status until the disposition and/or corrective actions have been approved by the NRC staff.
(5) Cylinder blocks shall be inspected for "ligament" cracks, "stud to-stud" cracks and "stud-to-end" cracks as defined in the report* by Failure Analysis Associates, Inc. (FaAA) entitled "Design Review of TDI R-4 arid RV-4 Series Emergency Diesel Generator Cylinder Blocks" (FaAA Report No. FaAA-84-9-11.1) and dated December 1984.
(Note that the FaAA report specifies additional inspections to be performed for blocks with "known" or "assumed" ligament cracks.) The inspection intervals (i.e.,
frequency) shall riot exceed the intervals calculated using the cumulative damage index model in the subject FaAA report. In addition, inspection methods shall be consistent with or equivalent to those identified in the subject FaAA report.
Blocks determined in the future to have "ligament" cracks as the result of the above inspections should be inspected at each refueling outage to determine whether or not cracks have initiated on the top surface, which was exposed because of the removal of two or more cylinder heads. This process should be repeated over several refueling outages until the entire block has been inspected. If after this process has been completed new "ligament" cracks are found, this process should again be repeated. Liquid penetrant testing or a similarly sensitive nondestructive testing technique should be used to detect cracking, and eddy current testing should be used as appropriate to determine the depth of any cracks discovered.
Whenever diesel generator No. 1 is operated in excess of 4375 kW for one hour or more, a visual inspection of the right bank cylinder block is to be performed under intense light within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> after engine shutdown to verify the absence of "stud to-stud" and "stud-to-end" cracks.
If "stud-to-stud" or "stud-to-end" cracks are found, these findings are to be reported to the NRC within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The affected engine is to be considered inoperable and is not to be
- This report was transmitted to H. R. Denton, (NRC), from C. L. Ray, Jr., (TDI Owners Group), by letter dated December 11, 1984.
-4 restored to operable status until the disposition and/or corrective actions have been approved by the NRC staff.
(6) All diesel starts for testing and surveillance will be slow starts (greater than 24 seconds duration) except for the fast start required by Technical Specification 4.4.F conducted once per 18 months during shutdown and any other fast start required following specific maintenance involving the fast start capability.
- 3. This license amendment is effective as of the date of its issuance and must. be fully implemented no later than 30 days from the ddte of issuance.
FOR THE NUCLEAR REGU TORY COMMISSION George Knighton irector Project Directorate V Division of Reactor Projects -
- III, IV, V and Special Projects
Attachment:
Changes to the Technical Specifications Date of Issuance: April 14, 1989
ATTACHMENT TO LICENSE AMENDMENT NO. 123 PROVISIONAL OPERATING LICENSE NO. DPR-13 DOCKET NO. 50-206 Revise Appendix A Technical Specifications by removing the pages identified below and inserting the enclosed pages. The revised pages are identified by the captioned amendment number and contain marginal lines indicating the area of change.
REMOVE INSERT 52 52 53b 53b 53d 53d
52 EMERGENCY POWER SYSTEM PERIODIC TESTING APPLICABILITY:
Applies to testing of the Emergency Power System.
OE ECTIVE:
To verify that the Emergency Power System will respond promptly and properly when required.
SPECIFICATION:
A. The required offsite circuits shall be determined OPERABLE at least once per 7 days by verifying correct breaker alignments and power availability.
B. The required diesel generators shall be demonstrated OPERABLE:
- 1. At least once per 31 days on a STAGGERED TEST BASIS by:
- a. Verifying the diesel performs a DG SLOW START from standby conditions,
- b. Verifying a fuel transfer pump can be started and transfers fuel from the storage system to the day
- tank,
- c. Verifying the diesel generator is synchronized and running at 6000 kW (+100 kW, -500 kW) for
> 60 minutes,
- d. Verifying the diesel generator is aligned to provide standby power to the associated emergency
- buses,
- e. Verifying the day tank contains a minimum of 290 gallons of fuel, and
- f. Verifying the fuel storage tank contains a minimum of 37,500 gallons of fuel.
- 2. At least once per 3 months by verifying that a sample of diesel fuel from the required fuel storage tanks is within the acceptable limits as specified by the supplier when checked for viscosity, water and sediment.
C. AC Distribution
- 1. The required buses specified in Technical Specification 3.7, Auxiliary Electrical Supply, shall be determined OPERABLE and energized from AC sources other than the diesel generators with tie breakers open between redundant buses at least once per 7 days by verifying correct breaker alignment and power availability.
SAN ONOFRE -
UNIT 1 Amendment No. ?5,00,0Z,
53b
- 2. Simulating SISLOP*, and:
- a. Verifying operation of circuitry which locks out non-critical equipment,
- b. Verifying the diesel performs a DG FAST START from standby condition on the auto-start signal, energizes the emergency buses with permanently connected loads and the auto connected emergency loads** through the load sequencer (with the exception of the feedwater, safety injection, charging and refueling water pumps whose respective breakers may be racked-out to the test position) and operates for > 5 minutes while its generator is loaded with the emergency loads, C. Verifying that on the safety injection actuation signal, all diesel generator trips, except engine overspeed and generator differential, are automatically bypassed.
- 3. Verifying the generator capability to reject a load of 3220 kW without tripping.
SISLOP is the signal generated by coincident loss of offsite power (loss of voltage on Buses lC and 2C) and demand for safety injection.
The sum of all loads on the engine shall not exceed 6,000 kW.
AMENDMENT NO.:
104,123
53d Basis:
The normal plant Emergency Power System is normally in continuous operation, and periodically tested.(1 )
The tests specified above will be completed without any preliminary preparation or repairs which might influence the results of the test except as required to perform the DG SLOW START test set forth in T.S. 4.4.B.I.a. The tests will demonstrate that components which are not normally required will respond properly when required.
DG SLOW STARTS are specified for the monthly surveillances in order to reduce the cumulative fatigue damage to the engine crankshafts to levels below the threshold of detection under a program of augmented inservice inspection. In the event that the DG SLOW START inadvertently achieves steady state voltage and frequency in less than 24 seconds, the surveillance will not be considered a failure and require restart of the diesel generator.
The surveillance requirements for demonstrating the OPERABILITY of the station batteries are based on the recommendations of Regulatory Guide 1.129, "Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Nuclear Power Plants," February 1978, and IEEE Std 450-1980, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and Substations."
Verifying average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage on float charge, connection resistance values and the performance of battery service and discharge tests ensure the effectiveness of the charging system, the ability to handle high discharge rates and compares the battery capacity at that time with the rated capacity.
Table 4.4-1 specifies the normal limits for each designated pilot cell and each connected cell for electrolyte level, float voltage and specific gravity. The limits for the designated pilot cells float voltage and specific gravity, greater than 2.13 volts and.020 below normal full charge specific gravity or a battery charger current that has stabilized at a low value, is characteristic of a charged cell with adequate capacity. The normal limits for each AMENDMENT NO.
05,104,123